import Data.List

py :: [Int] -> [Int] -> Int
py ws bs = max (iter 0 (head ws)) (iter 1 (head bs)) where
    iter i n
        | null l    = 1
        | otherwise = 1 + iter (1-i) (head l)
        where
            l   | i == 0    = filter (>n) bs
                | otherwise = filter (>n) ws

main = do
    getLine
    ws <- sort . map read . words <$> getLine
    getLine
    bs <- sort . map read . words <$> getLine
    print $ py ws bs